Process of producing erythrene.



Be it known that we, LUcAs P.

UNITED STATES PATENT OFFICE.

LUCAS PETRON KYRIAKIDES AND RICHARD 1B. EARLE, OF BOSTON, MASSACHUSETTS,

ASSIGNORS TO HOOD RUBBER COMPANY, OF BOSTON, MASSACHUSETTS, A CORPO- RATION OF MASSACHUSETTS.

PROCESS OF PRODUCING EBYTHRENE.

No Drawing.

To all whom it may concern KYRIA- RIDES and RICHARD B. EARLE, citizens of the United States, residing at Boston, Mas sachusetts, have invented certain new and useful Improvements in Processes for Producing Erythrene, of which the following is a specification.

Our invention relates to a new and valuable process for producing erythrene (divinyl) which is a valuable hydrocarbon used for the production of rubber-like substances and terpenes.

The new process consists in passing the vapors of normal butyraldehyde of the formula:

CH,CH,CH -CHO In order to illustrate the process more fully the followin example is given. The

butyraldehyde is distilled slowly over aluminum silicateeither powdered or in briquet form, the pressure being reduced to one millimeter of mercury by a vacuum pump and the aluminum silicate being kept at a Specification of Letters Patent.

Application filed November 11, 1911. Serial No. 659,821.

Patented July 23, 1912.

temperature of 550 C. The products .of the reaction are condensed in suitable receivers by means of refrigerating agents and purified by distillation. The unchanged butyraldehyde is again passed OVCI' the catalytic as before, the total yield of crude erythrene being over 70% of the theory.

We claim:

1. The process for producing erythrene which consists in passing the vapors of normal butyraldehyde CH CH,CH -CHO CH,CH,-CH,CHO

over heated aluminum silicate at temperatures from 500600 0., in came, at pressures less than 60 millimeters of mercury.

In testimony whereof, We afiix our signatures in presence of two Witnesses.

LUCAS PETRON KY-RIAKIDES.

RICHARD B. EARLE. Witnesses:

JESSIE R. Mo'rr, M. ALICE HAGARTY. 

